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A comparative study of the thermal discharge behaviour of cellulose diacetate and cellulose triacetate films
Author(s) -
Naidu Y. R. Vidyadhar,
Sagar D. S.,
Sharma A. K.
Publication year - 1994
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.1994.210340405
Subject(s) - cellulose triacetate , cellulose , thermal , materials science , polarization (electrochemistry) , dipole , polymer chemistry , analytical chemistry (journal) , chemical engineering , chemistry , organic chemistry , thermodynamics , physics , engineering
The thermal discharge behaviour of cellulose diacetate (CA2) (39% acetyl content) and cellulose triacetate (CA3) (44% acetyl content) films was studied at different polarizing temperatures and fields. Cellulose diacetate exhibited two peaks, one at low temperatures and the other at high temperatures, whereas cellulose triacetate exhibited only one peak. The origin of these peaks in CA2 is attributed to dipolar orientation and space charge polarization respectively, while the only peak in CA3 is due to space charge polarization. The difference in thermal discharge behaviour of CA2 and CA3 is attributed to the difference in acetyl contents of the two acetates.